1. Department Structural Change, Leibniz Institute of Agricultural Development in Transition Economies (IAMO), Halle (Saale), Germany
2. Department of Plant Sciences, University of California, Davis, CA, USA
3. Leibniz Centre for Agricultural Landscape Research (ZALF), Müncheberg, Germany
4. Natural Resource Management, International Institute of Tropical Agriculture (IITA), Kacyiru, Kigali, Rwanda